Had a great stay at Fiona's place for 4 nights with a friend.
Apartment is really nice - exactly like the pictures. Very comfortable and relaxing space - two spacious double bedrooms, two bathrooms (one shower) and a great open plan living area on the lower level.
Pool area is really nice and was really quiet when I was there - there's also a gym there (although I didn't use it).
The location is great - lots of interesting bars, coffee shops, street food nearby. We were both familiar with BKK from previous visits, but Thong Lo was a new area for us and we really liked it. It's fairly chill, but also quite a hip area.
Didn't meet Fiona (or the contact, Melissa) but we got detailed directions, and spoke to Melissa via SMS a few times - always a quick response. Also, very flexible on checkout and check in times which was a big benefit to us.
Overall, a great stay in a lovely apartment. I would not hesitate to recommend it!